已知H2(g)+Cl2(g)==2HCl(g) △H=―184.6kJ·mol—1,则反应HCl(g)=1/2H2(g)+1/2Cl2(g)的△H为
A.+184.6kJ·mol—1 | B.+92.3kJ·mol—1 |
C.―184.6kJ·mol—1 | D.―92.3kJ·mol—1 |
已知H2(g)+Cl2(g)==2HCl(g) △H=―184.6kJ·mol—1,则反应HCl(g)=1/2H2(g)+1/2Cl2(g)的△H为
A.+184.6kJ·mol—1 | B.+92.3kJ·mol—1 |
C.―184.6kJ·mol—1 | D.―92.3kJ·mol—1 |